Air-compressor.



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/NVENTOR Patented Jul'y'zo, '1909'.

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Lo PERRY.'

AIB COMPRESSOR.

PILIATITILED SEPT. 9, 1907.

T. 0. PERRY.

AIR COMPRESSOR. AP'rLIoATIoH FILED SEPT. 9, mov.

Patented July 20, 1909.

T. 0. PERRY.

AIR COMPRESSOR.

APrLIoATIoN rILnn SEPT. 9, 1901.

928,326. Patented July 20.1909.

IN1/Enron BBHEETB-BHEBT 3.

'same as fully `shown and described in my, j patent for! windmill, No. y 772,052, issuedl l October-11th, 1904. 'Asup I To. 'it my concern.

vNo. 5328 Prairie avenue, Chica county of Cook. and State of Illlnois, have" invented certain new and useful Y T HAS O. PERRY, OF CHICAGO, ILLINOIS.

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I Specification of Letters Patent.

Application med september 9, 1907. serieuA No. 892,064.

n that 1, THOMAS O.` PERRY, a citizen of the 'United States, 4residing at o, in the Be it known Improve- Y ments in Air-Compressors, of which the following is a speciiication.

This invention relates to improvements in air compressors, especially whenoperated by wind power. I

The objects of my invention are, first, to provide a safety valve which shall render oyer-compression and undue strains impossible, and second, to provide such means for supportin the compreor cylinder that dis- 3 3 of Figs. 5 and 4;Fig. et is a plan of the a cross-head, G. Plunger rods,G2,

' thec'ap, C, and is centrally connected to the the air compressor; and

tion. showing, on a reduced scale, how the tortion w1 not occur under normal strains.

These objects I attain byv the 'mechanism' `lllustrated inthe accompanying drawings, 20.

in whichp Figure1 lis an exteriorsideelevation of the air compressor and its supports; Fig. 2 is an exterior front elevation of the air com-- Apressor and its supports; Fig. 3 is a sectional elevation of the air compressor on the line plunger packing showin 0 the plunger in sect1on; F1g. 5 1s 4a plan o the head or cap of air compressor is supported and operated when the. motive power is a wind mill mounted on a tower. v

Similar' letters refer to similar parts throughout the several views. l

Thecompressor cylinder, E, has exterior fianges at both its upperand lower ends. The cap, C, is secured to theupper end of the cylinder by screws entering the upper ila-nge'. The plunger, F, iit's the interior of the cylinder E, loosely, is closed vat its -upper end, protrudes from the lower end of the cylinder, and carries at its lower extremity rigidly connect the crossfheads'- with the drive-head,

G', which is adapted' to reciprocate above actuating rod, r, of the wind mill. This actuating rod, r, the windmill, B, D, K, P, R, S, V, and the supporting pipe, A, are the orting plate, A, -is's'ecuredlto the lower' en not the pipe, A, whichy supportsthe windmlllfat itsA upper end. 'Supporting guide rods, C2',' pass Fig. `6 isan eleva-- `as the packing ring, n. y

ing space is also adapted' to the' plunger,

. loosely through the drive-head and rigidlyr connects the cylinder cap, ing plate, A.

Surrounding the plunger and drawn to C, to the supportthe lower cylinder `iiange by screws is av clamping ring, N, having an interior flange underneath loosely fitting the plunger, and inclosing together with the cylinder end an annular packing space. drical. packing, Q, exteriorly fianged on its under side surrounds and presses against the plunger within the annular space. A pack ing ring, n, vis interposed between the cylinder end and the exterior flange of the packing so that it binds the packing flange by tightening .the clamping screws. Between the upperportions of the packing, Q, and

Patented July l2o, 190e.

An elastic cylinr packing ring, n, is a thin annular recess l adapted to receivingl packing-springs, g, which react between the packing ring and elastic packing. These packing springs are preferably arranged in two annular layers, one within the other, and each layer is made up of several thin, fiat spring sections. Four spring sections are shown in each layer-in Fig. 1l. The spring sections are all under tension. 4These spring sections may all be nearly straight before being sprung into the annular recess, or they may be curved before insertion as suits best the tension required when in place. The packing may be made of leather or other ylelding material. The upper side of the clamping ring, N,.loosely incloses an annular shoulder on the end of the cylinder of the same external diameter The annularpac to receive other forms of packing such as are ordinarily used.

' The cross-head, G, is not rigidly connected F -but is .merely guided loosely in its open lower end and is carried rigidly by the tie rod, L', whoseiupper end connects with a safety valve, L, which seats against and is guided in the up er closed ,head of the plunger. A power l safety spring, M, surroundi'n ybetween the closed hea of the plunger and the tie rod, reacts the cross-head so as to 'hold the safety valve closed.y The' safety-spring should have sufiicient tension to drive the plunger, Without yielding, against any normal resistance, but it is designed to yield to abnormal reslstance,

-such as might'result from accidentalv clogging of theoutlet, or undue compression of air, so as to relleve the vexcessive pressure by loo HCI,

of the safety-valve lets compressed air pass vsufficiently to avoid dangerous pressure.

lIn the cylinder head is a check valve, J, opening outward, covered by a cap, O,'from which the outlet or delivery pipe, O, rises.

The intake valve, H, opens inward and is carried by and rests against a hollow cage, which screws into the cylinder head to one side of the outlet. The guiding stem of the intake valve' reaches up through the center of the cage and terminates in a knob, H', attached so as to form a shoulder, beneath which. a helical spring, H2, coiled around the stein and resting in a recess of the cage, reacts to balance the Weight of the -valvemore or less, The under side of the knob, H', is guided in a recess', and its upper part is enlarged so as to limit the vertical movement of the intake valve. Around the peripheryof the cage are openings for the .passage of air.

While this invention is especially applicable to air compressors .actuated by wind power, it may also apply to pumps for forcing other fluids, and may be used to advantage in connection with actuating motors other than windmills. I

What I claim as my invention, and desire to secure by Letters Patent, is

l. In anv air compi-essor, the combination With a cylinder havingintake and outlet valves, of a'plunger or piston 4provided with a safety valve normally inoperative, a spring under tension holding said safety valve closed, aiidlactuating connections adapted to act against lthe tension of said spring to drive said plunger during its lcompressing stroke, said spring having suflicienttension to resist all ordinary driving action of said 'actuating connections and yielding only under abnormal strains suiiiciently to letair escape past said safetyvalve, substantially as herein set forth. l

2. In an air compressor having a reciprocating part and stationary parts, the combination with intake and outlet valves, of a safety valve normally inoperative, av spring under tension "holding said safety valve closed, and actuating connectionsadapted to act against the tension of said spring to' drive. said reciprocating part during compression of air, said spring having sufficient tension t'o resist all ordinary driving action of said connections and yielding only under abnormal strains to let air escape past said safety valve, substantially as herein setvfor'th.

3.,In an air compressor, the 4combination with intake and outlet valves, of a safetyvalve, a spring under'tension holding said safety valve closed, and actuating connections` acting against the tension of said spring to operil said safetyy valve whenever the strain on said actuating connections vac cidentally becomes abnormally great, substantially .as herein 'set forth.

4. In an air compressor, the combination with a cylinder having vintake and outlet valves, of a hollow plunger having its inner end closed, a safety-valve closing exteriorly against theclosed head of the plunger, an actuating head guided loosely on the plunger and operatively connected to the safety-valve, and a safety-spring reacting between the actuating headand the plunger sov as to hold the safety-.valve closed and propel the plunger without yielding against the resistance of normal Work, rand yet yielding under abnormal strains suliiciently to open the safety-valve substantially as herein set forth.

5. In an air compressor, the combination with a plunger, or pistn, and a cylinder having intake and outlet valves, of a safetyvalve in said plunger, an actuating head operatively connected to said safety valve,

and a safety spring reacting between the actuating head and the plunger so as tohold the safety valve closed and propel the plunger without yielding to the resistance of normal work, and yet yield under abnormal 6. In an air compressor, with a plunger or piston, having intake and outlet valves, of valve in said plunger, an actuating head, and a safety spring adapted to close said safetyvalve and resist the operative thrust of the actuating head, whereby the yielding'of said safety spring vunder abnormal strain may open the safety valve, Asubstantially as herein set forth. v y

7. In an air compressor, the combination with a plunger' or piston, and a cylinder having a closed head -against which air'iscompressed by the4 plunger, and intake and outlet valves, of a supporting plate, and supporting rods or pillars separating said closed .the combination and a cylinder head from said supporting-plate to sustain the thrust Aof compression,substantialy as herein set forth. y v

8. In an air compressor, the combinationv with a lunger or piston, and a cylinder having a c osed head against which air is com-y pressed by the plunger, and an intake lvalve, of a supporting plate, and supporting rods or pillars separating said closed head from said supporting plate, and an outlet valve located in said closed head, substantially as herein set forth.

9. .In an air compressor, the combination with a plunger or piston, and a cylinder hav-v ing a c osed head against Which air is coin-- pressed by the plunger, of a supportingv plate, and supportin rods or pillars separating said closed hea from said supporting plate, and inlet and outlet valves located in aihclosed head, substantially. as herein set vstrains sufficiently to open the safety valve, substantially as herein set forth.

a safety Y was . centra o ening..in said supporting .ingaose porting rods or p ging rods 10`. Inuan air compressor, the combination with a lun'er or plston, and a cylinder hav head against whichair is .compressed by the plunger, and intake and out et valves, of a su porting plate,l and supars'separating said closed ead from said supporting plate, and a drive head guided on said supporting rods and adlptedI to actuate said plunger, substantia y as herein set forth. v

' 11. In an air. compressor, the combination with la lunger or piston, and a cylinder having a c osed head against which air is compressed byv the plunger, of a. supporting plate, and supportin rods or pillars separating said closed head from said supporting plate, and inlet and outlet valves, and acces vseries to said valves protruding from said closed head toward said supporting plate, substantially as herein set forth.

12. In' an air compressor, the combination with a plunger or piston, and a cylinder having a c oseda head against which air is compressed bfy the plunger, andv inlet 'and outlet valves, c a supporting plate having a cen- Y `tral opening .sup orting rods or illars se arating said c ose head from saifsupp'ortiilg plate, a drive head guidedl on said supporttendin from said drive head throughl the ate substantia ly as herein set forth. P

. 7.13. In anair compressor, the combination with a plunger or piston, and a cylinder havpressing thrust ofthe fand having operativeeonnections' vwith'- said plunger, and an actuating rod exing a closed head againstl which air is compressed b the plunger, of a supportingcplate separa by an interval from said osed head, inlet and outlet valves having accessories protruding into vsaid interval, yand oon'- nections between said supporting plate and said closed hea'd adapted to sustam the com-4 v plunger substantially as herein set forth.

14. Inan air compressor, the combination compressed betweensaid actuatin hea an said plunger and adapted to yie d only to abnormal actuating strain a safety-valve in L hm er .normally c osed, and means e so said wher y lt e yielding of said safety spring causes said safety valve t9 open, substantially as herein set forth. l

-In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

y THOMAS o. PERRY.

Witnesses:

J As. A. TowNsnNn, l G. R. -Bnowlm 

